Hello @Turbzy and welcome to the Community. When I click on your link it opens a blank neck diagram with no settings saved.
When I select C as root note and Major as the type of scale I see this:
What this shows is each and every occurrence of all of the seven notes contained within the C major scale. It contains only natural notes:
C, D, E, F, G, A, B
The lowest possible scale note playable on a guitar is the open E string. It is not the root note but it is a scale note.
The diagram also shows no user-friendly patterning such as the CAGED system that @stitch mentions. Using metaphor, it is the entire contents of the C major box thrown onto the floor.
Justin teaches CAGED patterns and also emphasises the importance, when practicing, of starting and ending on the lowest root note of the scale - to get the sound of home in your ears.